The Megger LT300-EN high current loop tester measures current, resistance, and voltage on single-phase and three-phase high-current systems. The unit has a large LCD display for visibility in low light conditions. The tester measures voltage from 0 to 550V, current from 0 to 27A, frequency from 16 to 400Hz, and resistance from 0 to 200 ohms. The unit is safety rated to European Standard 61010-1, Category IV 300V (phase to earth) and 550V (phase to phase). The case is enclosed to Ingress Protection (IP) 54 standards for protection against dust and splashing water. The LT300-EN is used by electricians and electrical contractors.